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- Tell uswhat’s going on, by phone or the form
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Furnace Repair in the San Fernando Valley
When your furnace stops working, waiting isn’t really an option, especially on a cold Valley night. Valley HVAC Network connects you with independent, licensed local HVAC professionals who handle furnace repair throughout the San Fernando Valley.
Common Furnace Problems We Connect Homeowners With Help For
- No heat at all — often caused by a failed ignitor, faulty thermostat, tripped breaker, or pilot light issue
- Furnace turns on and off repeatedly (short cycling) — frequently linked to a dirty air filter, a failing flame sensor, or improper airflow
- Weak or insufficient heat — can point to a clogged filter, ductwork issues, or a furnace that’s undersized for the home
- Strange noises — banging, rattling, or screeching sounds often signal a mechanical issue that shouldn’t be ignored
- Burning smell or unusual odors — sometimes normal when a furnace first runs after months of disuse, but a persistent smell can indicate a real problem and should be checked promptly
- Thermostat not responding correctly — could be a wiring issue, dead batteries, or a failing thermostat unit (more on thermostat repair)
- Pilot light won’t stay lit — common in older furnace models, often related to a faulty thermocouple
Why Valley Homes Need Reliable Furnace Repair
While the San Fernando Valley is known for its heat, winter nights here regularly drop into the 40s, and colder snaps can go lower. Many Valley homes, especially older ones, have furnaces that are original to the house or nearing the end of their expected lifespan, making unexpected breakdowns more common exactly when you need heat most.
A Safety Note
If you smell gas, hear a hissing sound near your furnace, or suspect a carbon monoxide issue (headaches, dizziness, or nausea that improve when you leave the house), leave your home immediately and call your gas utility or 911. This is a safety emergency, not a standard repair call.
Quick Checks Before You Call
- Thermostat: set to Heat, set above the room temperature, with fresh batteries.
- Air filter: a clogged filter can make the furnace overheat and shut itself off. Replace it if it’s dirty.
- Power: check the breaker and the on/off switch near the furnace (it often looks like a light switch).
- Gas: make sure the gas valve to the furnace is on, and that other gas appliances are working.
If you smell gas, don’t check anything. Leave the house right away, don’t use light switches or phones inside, and call SoCalGas at 1-800-427-2200 or 911 from outside.
Repair or Replace Your Furnace?
Furnaces often last 15 to 20 years or more. Replacement is usually worth considering when yours is past that age, needs a major part like a heat exchanger, or keeps breaking down. A cracked heat exchanger is a safety issue, not just a repair: it can leak carbon monoxide into your home.
Because Valley winters are mild, many homeowners replacing an old furnace choose a heat pump instead, which provides both heating and air conditioning.
Common Questions
Why does my furnace turn on and then shut off?
This is called short cycling. It’s often caused by a dirty filter, a dirty flame sensor or an overheating problem. Have it checked, since some causes are safety related.
Do I need a carbon monoxide detector?
Yes. California law requires carbon monoxide alarms in homes with gas appliances, a fireplace or an attached garage. Test them regularly, especially before the heating season.
How much does furnace repair cost?
Simple fixes like a flame sensor, igniter or filter-related problem are usually on the lower end. Blower motors, control boards and gas valves cost more, and a cracked heat exchanger often means replacement. Ask for the diagnosis and a written price before any work starts.
Before you call: 7 quick checks
What Happens When You Call
- Tell us what’s happening with your furnace and where you’re located
- We connect you with an independent, licensed HVAC contractor who services your neighborhood
- They diagnose and repair the issue, often same-day for urgent no-heat situations
Related articles
- Furnace Repair or Replace? How to Decide This Winter
- Wall Heater & Floor Furnace Repair
- Heater Smells Like Burning? What’s Normal the First Time You Turn It On
- Get Your Heater Ready for Winter: A Valley Checklist
- Gas Company Shut Off Your Furnace? What It Means and What to Do
Valley HVAC Network is a referral service, not an HVAC contractor. Learn more about how this works →
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